listtest.java

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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;


public class ListTest extends JFrame
{
	private JList colorList;
	private Container cn;
	
	private String colorNames[] = {"Black","Blue","Cyan","Dark Gray",
	    "Green","Gray","Magenta","Orange","Pink","Red","White",
	    "Yellow"};
	private Color colors[] = {Color.black,Color.blue,Color.cyan,Color.darkGray,
	  Color.gray,Color.green,Color.lightGray,  Color.magenta,Color.orange,
	  Color.pink,Color.red,Color.white,Color.yellow};
	
	public ListTest()
	{
			super("List Test");
			
			cn = getContentPane();
			cn.setLayout(new FlowLayout());
			
			//creat a list with items in colorNames array
			colorList = new JList(colorNames);
			colorList.setVisibleRowCount(5);
			
			//do not allow multiple selections
			colorList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
			
			//add a JScrollPane containing JList to content Pane
			cn.add(new JScrollPane(colorList));
			
			colorList.addListSelectionListener(
			new ListSelectionListener()
			{
					public void valueChanged(ListSelectionEvent e)
					{
							cn.setBackground(colors[colorList.getSelectedIndex()]);
						}
				});
				
			setSize(600,500);
			setVisible(true);
		}
		public static void main(String []args)
		{
				ListTest app = new ListTest();
				app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			}
}